﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebApplication1
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
           if(!IsPostBack)
            {
                Label1.Text = "请输入";
            }
        }

        protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
        {
            
        }

        protected void TextBox3_TextChanged(object sender, EventArgs e)
        {
            this.Label3 = Label1;
        }
    }
}